Crystal structure and Hirshfeld surface analysis of isopropyl 4-[2-fluoro-5-(trifluoromethyl)phenyl]-2,6,6-trimethyl-5-oxo-1,4,5,6,7,8-hexahydroquinoline-3-carboxylate

In the crystal, an infinite chain along the a-axis direction with a C(6) chain motif is formed by N—H⋯O hydrogen bonds. C—H⋯O and C—H⋯F interactions connect these chains, generating a three-dimensional network. In addition, C—H⋯π interactions connect the molecules into layers parallel to the (100) plane.


Supramolecular features and Hirshfeld surface analysis
In the crystal, N-HÁ Á ÁO hydrogen bonds link the molecules into infinite chains with a a C(6) chain motif (Bernstein et al., 1995) along the a-axis direction (Table 1 and Fig. 2). These chains are linked together by C-HÁ Á ÁO and C-HÁ Á ÁF interactions (Table 1 and Fig. 3), forming a three-dimensional network. C-HÁ Á Á interactions link the molecules into layers parallel to the (100) plane (Table 1 and Fig. 4).
The Hirshfeld surface analysis of molecular crystal structures is an attempt to go beyond crystal packing diagrams with molecules represented by different patterns and internuclear distances and angles. View of the title molecule. Displacement ellipsoids are drawn at the 30% probability level. For clarity, only the major disorder components are included.

Figure 2
A view of the molecular packing of the title compound, showing the N-HÁ Á ÁO hydrogen bonds. Only the major components of the disordered atoms are shown. Table 1 Hydrogen-bond geometry (Å , ).

Figure 3
A view of the molecular packing of the title compound, showing the N-HÁ Á ÁO, C-HÁ Á ÁO and C-HÁ Á ÁF hydrogen bonds.

Refinement
Crystal data, data collection and structure refinement details are summarized in Table 3. All C-bound H atoms were placed in geometrically idealized positions (C-H = 0.95-1.00 Å ) while the hydrogen atom attached to N1 was found in a difference map, and was subsequently refined freely [N1-H1N = 0.88 (2) Å ]. All C-bound H atoms were included as riding contributions with isotropic displacement parameters 1.2 times those of the parent atoms (1.5 for methyl groups). All F atoms of the trifluoromethyl unit of the molecule are disordered over two sites [relative occupancies 0.763 (5)   program(s) used to solve structure: SHELXT (Sheldrick, 2015a); program(s) used to refine structure: SHELXL (Sheldrick, 2015b); molecular graphics: ORTEP-3 for Windows (Farrugia, 2012); software used to prepare material for publication: PLATON (Spek, 2020). Special details Geometry. All esds (except the esd in the dihedral angle between two l.s. planes) are estimated using the full covariance matrix. The cell esds are taken into account individually in the estimation of esds in distances, angles and torsion angles; correlations between esds in cell parameters are only used when they are defined by crystal symmetry. An approximate (isotropic) treatment of cell esds is used for estimating esds involving l.s. planes.